audio research
CLASSIC 120

Description
Hybrid tube/FET mono power amplifier.

Introduced
1990

Discontinued
?

Revisions
-

Options
Balanced inputs

MSRP (US new retail)
$6,995/pair

Specifications

Power output

110 watts minimum continuous at 16 ohms from 20Hz to 20kHz with less than 1.0% total harmonic distortion (typically below .005% at 1 watt)
Approximate actual power available at "clipping": 115 watts (1kHz)

Power bandwidth (-3dB points) 10Hz to 80kHz
Frequency response  
Input sensitivity .65V RMS for rated output
Input impedance 100K ohms
Output taps 4, 8, 16 ohms
Output regulation Approximately 0.2dB 16 ohm load to open circuit
Overall negative feedback 21dB
Damping factor Approximately 45
Distortion  
Slew rate 17V/µs
Rise time 2.0µs
Hum & noise Less than 1.0mV RMS - 92dB below rated output (20kHz bandwidth unweighted, input shorted)
Power supply energy storage Approximately 415 joules
Power requirements 105-125VAC 60Hz (210-250VAC 50Hz) 450 watts at rated output, 700 watts maximum, 330 watts at "idle"
Tube complement (4 matched pairs) 6550, (2) 6FQ7/6CG7
Other  
Dimensions 19" (48 cm) W (standard rack panel) x 8 ¾" (22 cm) H x 15 ¾" (40 cm) D (front panel back). Handles extend 1 5/8" (4.1 cm) forward of the front panel. Output connectors extend 1" behind rear panel.
Weight 61 lbs. (27.7 kg) Net, 75 lbs. (34.1 kg) Shipping

Reviews

Pictures